java.sql.SQLException : 클라이언트가 연결을 체크 아웃하려고 시도한 시간이 초과되었습니다.

시작시 연결 풀을 설정할 예정이지만 시간 초과 오류로 인해 연결 풀을 설정해야하는 Java 클라이언트 서버가 있습니다. 이이 같은 문제에 너무 많은 스레드가 있지만 해결책으로 아래 JDK 7을 사용하는 날java.sql.SQLException : 클라이언트가 연결을 체크 아웃하려고 시도한 시간이 초과되었습니다.

오전 근무하지 않고하면 mchange 받는다는 의존성을

<dependency> 
    <groupId>com.mchange</groupId> 
    <artifactId>c3p0</artifactId> 
    <version>0.9.2.1</version> 
</dependency>

jdbc.properties 여기

url=jdbc\:sqlserver\://server\\instance;databaseName\=db 
driver=com.microsoft.sqlserver.jdbc.SQLServerDriver 
user=admin 
password=admin 
maxPoolSize=20 
minPoolSize=5 
acquireIncrement=5

입니다 서버 시작시 연결 풀을 설정하는 DAO 클래스입니다.

public class ShareDocDAO { 
//.......... 
private static Connection getConnection() throws SQLException { 
     LOG.info("Getting DB connection"); 
     ComboPooledDataSource cpds = getPool(); 

     return cpds.getConnection(); //Line 36: 
    } 
private static ComboPooledDataSource getPool() { 
     if (pool!=null) { 
      return pool; 
     } 

     ComboPooledDataSource cpds = new ComboPooledDataSource(); 
     try { 
      Properties dbProperties = getDbProperties(); 

      //loads the jdbc driver 
      cpds.setDriverClass(dbProperties.getProperty("driver"));    
      cpds.setJdbcUrl(dbProperties.getProperty("url")); 
      cpds.setUser(dbProperties.getProperty("user")); 
      cpds.setPassword(dbProperties.getProperty("password")); 

      // the settings below are optional -- c3p0 can work with defaults 
      cpds.setMinPoolSize(Integer.valueOf(dbProperties.getProperty("minPoolSize"))); 
      cpds.setAcquireIncrement(Integer.valueOf(dbProperties.getProperty("acquireIncrement"))); 
      cpds.setMaxPoolSize(Integer.valueOf(dbProperties.getProperty("maxPoolSize"))); 
      cpds.setCheckoutTimeout(30000); 
      cpds.setIdleConnectionTestPeriod(10800); 
      cpds.setMaxIdleTime(21600); 
      LOG.info("cpds driver "+cpds.getDriverClass()+ " JDBC URL = "+cpds.getJdbcUrl() +" User = "+cpds.getUser()+ " Pwd = "+cpds.getPassword()+ " MinPoolSize "+cpds.getMinPoolSize() +" AcquireIncrement "+cpds.getAcquireIncrement() +" MaxPoolSize "+cpds.getMaxPoolSize()); 
     } catch (Exception ex) { 
      LOG.error("failed to create pool", ex); 
     } 
     pool = cpds; 
     return pool; 
    } 
}

다음은 스택 트레이입니다

[Oct 29 11:58:22] SSLHandshake-3 | ERROR | com.dc.ssltunnel.server.ShareDocDAO | Error querying for User Information 
java.sql.SQLException: An attempt by a client to checkout a Connection has timed out. 
    at com.mchange.v2.sql.SqlUtils.toSQLException(SqlUtils.java:118) 
    at com.mchange.v2.sql.SqlUtils.toSQLException(SqlUtils.java:77) 
    at com.mchange.v2.c3p0.impl.C3P0PooledConnectionPool.checkoutPooledConnection(C3P0PooledConnectionPool.java:687) 
    at com.mchange.v2.c3p0.impl.AbstractPoolBackedDataSource.getConnection(AbstractPoolBackedDataSource.java:140) 
    at com.dc.ssltunnel.server.ShareDocDAO.getConnection(ShareDocDAO.java:36) 
    at com.dc.ssltunnel.server.ShareDocDAO.checkSerialNumber(ShareDocDAO.java:75) 
    at com.dc.ssltunnel.server.MainServer.retrieveOrCreateClient(MainServer.java:95) 
    at com.dc.ssltunnel.server.MainServerHandshakeThread.handshake(MainServerHandshakeThread.java:58) 
    at com.dc.ssltunnel.server.MainServerHandshakeThread.run(MainServerHandshakeThread.java:71) 
    at com.dc.ssltunnel.utilities.threading.ShutdownThreadPoolExecutor$1.run(ShutdownThreadPoolExecutor.java:36) 
    at java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source) 
    at java.util.concurrent.FutureTask.run(Unknown Source) 
    at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source) 
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source) 
    at java.lang.Thread.run(Unknown Source) 
Caused by: com.mchange.v2.resourcepool.TimeoutException: A client timed out while waiting to acquire a resource from [email protected] -- timeout at awaitAvailable() 
    at com.mchange.v2.resourcepool.BasicResourcePool.awaitAvailable(BasicResourcePool.java:1416) 
    at com.mchange.v2.resourcepool.BasicResourcePool.prelimCheckoutResource(BasicResourcePool.java:606) 
    at com.mchange.v2.resourcepool.BasicResourcePool.checkoutResource(BasicResourcePool.java:526) 
    at com.mchange.v2.c3p0.impl.C3P0PooledConnectionPool.checkoutAndMarkConnectionInUse(C3P0PooledConnectionPool.java:755) 
    at com.mchange.v2.c3p0.impl.C3P0PooledConnectionPool.checkoutPooledConnection(C3P0PooledConnectionPool.java:682) 
    ... 12 more 
[Oct 29 11:58:22] SSLHandshake-3 | DEBUG | com.dc.ssltunnel.server.MainServerHandshakeThread | Handshake thread is done 
[Oct 29 11:58:22] SSLHandshake-3 | DEBUG | com.dc.ssltunnel.server.MainServerHandshakeThread | Handshake thread is done 
[Oct 29 11:58:22] SSLHandshake-1 | INFO | com.dc.ssltunnel.server.ShareDocDAO | Getting DB connection 
[Oct 29 11:58:22] SSLHandshake-1 | INFO | com.dc.ssltunnel.server.ShareDocDAO | Getting DB connection 
[Oct 29 11:58:22] SSLHandshake-3 | DEBUG | com.dc.ssltunnel.utilities.threading.ShutdownThreadPoolExecutor | RUNNABLE:removing total:2 
[Oct 29 11:58:22] SSLHandshake-3 | DEBUG | com.dc.ssltunnel.utilities.threading.ShutdownThreadPoolExecutor | RUNNABLE:removing total:2 
[Oct 29 11:58:22] SSLHandshake-1 | ERROR | com.dc.ssltunnel.server.ShareDocDAO | Error querying for User Information 
java.sql.SQLException: Connections could not be acquired from the underlying database! 
    at com.mchange.v2.sql.SqlUtils.toSQLException(SqlUtils.java:118) 
    at com.mchange.v2.c3p0.impl.C3P0PooledConnectionPool.checkoutPooledConnection(C3P0PooledConnectionPool.java:689) 
    at com.mchange.v2.c3p0.impl.AbstractPoolBackedDataSource.getConnection(AbstractPoolBackedDataSource.java:140) 
    at com.dc.ssltunnel.server.ShareDocDAO.getConnection(ShareDocDAO.java:36) 
    at com.dc.ssltunnel.server.ShareDocDAO.checkSerialNumber(ShareDocDAO.java:75) 
    at com.dc.ssltunnel.server.MainServer.retrieveOrCreateClient(MainServer.java:95) 
    at com.dc.ssltunnel.server.MainServerHandshakeThread.handshake(MainServerHandshakeThread.java:58) 
    at com.dc.ssltunnel.server.MainServerHandshakeThread.run(MainServerHandshakeThread.java:71) 
    at com.dc.ssltunnel.utilities.threading.ShutdownThreadPoolExecutor$1.run(ShutdownThreadPoolExecutor.java:36) 
    at java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source) 
    at java.util.concurrent.FutureTask.run(Unknown Source) 
    at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source) 
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source) 
    at java.lang.Thread.run(Unknown Source) 
Caused by: com.mchange.v2.resourcepool.CannotAcquireResourceException: A ResourcePool could not acquire a resource from its primary factory or source. 
    at com.mchange.v2.resourcepool.BasicResourcePool.awaitAvailable(BasicResourcePool.java:1418) 
    at com.mchange.v2.resourcepool.BasicResourcePool.prelimCheckoutResource(BasicResourcePool.java:606) 
    at com.mchange.v2.resourcepool.BasicResourcePool.checkoutResource(BasicResourcePool.java:526) 
    at com.mchange.v2.c3p0.impl.C3P0PooledConnectionPool.checkoutAndMarkConnectionInUse(C3P0PooledConnectionPool.java:755) 
    at com.mchange.v2.c3p0.impl.C3P0PooledConnectionPool.checkoutPooledConnection(C3P0PooledConnectionPool.java:682) 
    ... 12 more

누군가 내 구성/코드에 무슨 문제가 있습니까?

출처

2014-10-29 RanPaul

다른 매개 변수에서이 매개 변수를 테스트하여 작동하는지 확인 했습니까? –

예, 동일한 자격 증명을 사용하여 SQL Server 관리 스튜디오에 로그인 할 수 있었고 동일한 jdbc 속성으로 정상적으로 실행되는 다른 웹 응용 프로그램이 있습니다 – RanPaul

아마도 네트워크 문제 일 수 있습니다.이 응용 프로그램을 시작하는 서버가 ' 핑 (ping) '을 데이터베이스 서버에 보냅니다. –

문제는 직접 또는 간접적으로 호출되지 않습니다

Transaction.Begin()이 일반적이다. 이 문제는 세션, SessionFactory 또는 구성에 문제가 될 수 있습니다.

세션 객체로 Query를 수행하여 디버그 할 수 있습니다. 테스트 객체가 작동하면 트랜잭션을 추가하고 begin(), commit() 적절하게

출처

2015-01-27 20:29:48

java.sql.SQLException : 클라이언트가 연결을 체크 아웃하려고 시도한 시간이 초과되었습니다.

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